PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/09-21:43:00
G01     85.8           32.7               15.9 +/-    1.65      26.3 +/-    1.65  0.140 / 0.350
G07     128.7          42.7               20.1 +/-    0.53      28.1 +/-    0.53  0.300 / 0.280
G11     66.4           39.4               15.4 +/-    1.49      22.6 +/-    1.49  0.050 / 0.090
G13     290.7          36.7               16.9 +/-    1.97      25.9 +/-    1.97  0.070 / 0.110
G15     312.5          11.8                3.9 +/-   33.29      10.5 +/-   33.29  0.040 / 0.050
G17     218.2          52.8               20.5 +/-    1.32      25.0 +/-    1.32  0.040 / 0.060
G18     60.6           23.3               13.0 +/-    1.04      26.4 +/-    1.04  0.070 / 0.110
G19     216.5          29.9               22.0 +/-    1.62      38.6 +/-    1.62  0.120 / 0.160
G28     357.4          61.4               17.1 +/-    0.98      19.2 +/-    0.98  0.030 / 0.020
G30     116.9          71.0               19.0 +/-    0.82      20.0 +/-    0.82  0.030 / 0.030